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β Leporis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Lepus
Right ascension 05h 28m 14.7232s[1]
Declination −20° 45′ 33.988″[1]
Apparent magnitude (V) 2.84[2]
Characteristics
Spectral type G5II[1]
U-B color index +0.46[2]
B-V color index +0.82[2]
R-I color index +0.44[2]
Astrometry
Radial velocity (Rv) −13.6 ± 0.9[1] km/s
Proper motion (μ) RA: −5.03[1] mas/yr
Dec.: −85.92[1] mas/yr
Parallax (π) 20.49 ± 0.85[1] mas
Distance 159 ± 7 ly
(49 ± 2 pc)
Absolute magnitude (MV) −0.6[3]
Details
Mass 3[4] M☉
Radius 16[4] R☉
Luminosity 165[4] L☉
Temperature 5225[4] K
Rotational velocity (v sin i) 11[2] km/s
Other designations
Nihal, β Lep, Beta Leporis, Beta Lep, 9 Leporis, 9 Lep, BU 320A, ADS 4066 A, BD−20 1096, CCDM J05283-2046A, FK5 204, GC 6762, HD 36079, HIP 25606, HR 1829, PPM 248938, SAO 170457, WDS 05282-2046A.[1][5]
Database references
SIMBAD data

Beta Leporis (Beta Lep / β Leporis / β Lep) is the second brightest star in the constellation of Lepus.[4] It is a G-type bright giant star approximately 159 light-years from the Earth and has an apparent visual magnitude of approximately 2.84.[1]

It is also known as Nihal, from the Arabic نهال nihāl "(camels) quenching their thirst". The occasional spelling Nibal appears to be due to a misreading.[6]


Visual companions

The G-type bright giant has the multiple star designation WDS 05282-2046A and has a number of visual companions, shown below. Component B has been observed to fluctuate in brightness and is also catalogued as NSV 2008.[7]

Multiple/double star designation: WDS 05282-2046[5]
Component Primary Right
ascension (α)
Equinox J2000.0		 Declination (δ)
Equinox J2000.0		 Epoch of
observed
separation		 Angular
distance
from
primary		 Position
angle
(relative
to primary)		 Apparent
magnitude
(V)		 Database
reference
B A 05h 28m 14.6s −20° 45′ 32″[7] 1993 2.2″ 339° 7.5
C A 05h 28m 17.2s −20° 46′ 22″[8] 2000 58.5″ 140° 12.0 Simbad
D A 05h 28m 28.9s −20° 44′ 37″[9] 2000 210.4″ 73° 11.99 Simbad
E A 05h 28m 29.3s −20° 43′ 21″[10] 2000 242.8″ 59° 10.5 Simbad


References

  1. ^ a b c d e f g h i CCDM J05283-2046AB -- Double or multiple star, database entry, SIMBAD. Accessed on line November 18, 2008.
  2. ^ a b c d e HR 1829, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line November 18, 2008.
  3. ^ From apparent magnitude and parallax.
  4. ^ a b c d e Nihal, Stars, Jim Kaler. Accessed on line November 18, 2008.
  5. ^ a b Entry 05282-2046, The Washington Double Star Catalog, United States Naval Observatory. Accessed on line November 18, 2008.
  6. ^ pp. 265, 269, Star-names and Their Meanings, Richard Hinckley Allen, New York: G. E. Steichert, 1899.
  7. ^ a b NSV 2008, database entry, New Catalogue of Suspected Variable Stars, the improved version, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line November 18, 2008.
  8. ^ BD-20 1096C -- Star in double system, database entry, SIMBAD. Accessed on line November 18, 2008.
  9. ^ BD-20 1096D -- Star in double system, database entry, SIMBAD. Accessed on line November 18, 2008.
  10. ^ BD-20 1096E -- Star in double system, database entry, SIMBAD. Accessed on line November 18, 2008.
Stars of Lepus
1 • ε • ι • μ • κ • λ • ν • 8 • β (Nihal) • 10 • α (Arneb) • 12 • γ • ζ • δ • η • 17 • θ • 19
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